Improvement in metal-planers



WILLIAM. H. WARREN.

Improvement in Metal Planers.

Patented lune'20, 1871.

I il" lllllllll fil 1lllIIllfllilllllllllllliiiillil UNITED STATESPATENT QF-FIGE.

WILLIAM H. WARREN, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN METAL-PLANERS.

Specification forming part of Letters Patent N 0. 116,243, dated June20, 1871.

To all whom it may concern:

Be it known that I, WILLIAM H. WARREN, of Worcester, in the county ofWorcester and State of Massachusetts, have invented a new and valuableImprovement in Machines for Planing; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawingmaking a part of this specification and to the letters and figures ofreference marked there- I -on.

Figure 1 of the drawing is a top or plan view of my machine. Fig. 2'is acentral ver-. tical longitudinal section. Fig. 3 is a detailed view ofthe slotted crank and the driving gearwheeL- This invention hasrelations to machines for planing metals; and it consists in theapplication of certain devices, hereinafter described, by means of whichthe work-table, having a reciprocating rectilinear motion, is made totraverse an augmented distance, and otherwise improved in its mode ofoperation.-

In the accompanying drawing, which represents so much of aplaning-machine as is necessary to illustrate the nature of this invenband may be adjusted to any point therein.

H indicates a screw, which passes through the slot f in the arm F, andinto the block G. When the wheel I) revolves, reciprocating curvilinearmotion is given to the arm F, and by it, through the medium of the shaftE, to the crank-arm e. The sweep of the slotted and crank arms isregulated, as is also their speed, by the adjustment, as above stated,of the block G. I represents a horizontal table, arranged to slide backand forth on the bed-frame A, being connected to the crank-arm e bymeans of a pitman, i. From the under part of this table brackets Idepend and carry a transverse shaft, I, to each end of which a pinion,i, is made fast, and to the middle part a toothed wheel, J, of greaterdiameter, secured. In rotatin g, the toothed periphery of the lattertrav erses through a longitudinal slot, J, formed in the table I. Thepinions t" are set on racks 'i secured within the frame A, at eitherside thereof, as shown in Fig. 2 of the drawing. K indicates the table,upon which is placed the work to be planed. This table is constructedwith the ordinary A-shaped projections L, to slide in V-shaped grooveson the top of the frame A. It is also provided with a long invertedrack, M, which connects with the wheel J.

This invention, being now described, operates as follows: Reciprocatingmotion being given, as before mentioncd and described, to the crank-arme, the table I begins to move and carries along the shaft I. The pinionsi, then traveling over the racks i, are made to revolve, therebycommunicating rotary motion to the wheel J, which in turn propels thetable K. The distance which the table K travels is determined by therelative sizes of the pinions i and wheel J. For instance, if thecircumference of the wheel J should be five times as great as that ofthe pinions, it is evident that the latter would travel over onlyonefifth .the distance of the former. Hence, if the pinions shall passover three feet of the racks i, the wheel J would operate on fifteenfeet of the rack M. In'plainer terms, at every threefoot sweep of thecrank e, or such sweep as would move the table I that distance, thetable K would be propelled fifteen feet.

In reference to the comparative advantages possessed by aplaning-machine in which the appliances hereinbefore described areembodied, it may be observed that there are now in ordinary use twokinds of planing-machines for work upon metal. The one that appears tobe more generally used is the screw or rack planer, upon which,according to its capacity, can be planed work of from one inch up toforty feet or more.

One of the objections to this description of planer is that, fromvarious causes, it-does at any degree of speed without any bad results,and will plane the same distance at every stroke of the crank, but yetwill plane a distance only the length of the stroke.

The application of the improvements which have been specified remediesthe above-mentioned defect, and makes provision for planing work of anylength desired, and allowing the machine to be run at any speednecessary without liability to injury.

Having fully described my invention, what I claim is The wheel J, shaftI, pinions i, and racks i M, in combination with the rock-shaft E,applied to a planing-machine for the purpose of increasing the travel ofthe wor '-table, substantially as and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

WILLIAM H. WARREN.

Witnesses:

F. T. BLACKMER, H. O. GRATON.

